HR: 0830h
AN: H11G-0940    [PDF]
TI: Stochastic Modeling of Colloid-Contaminant Transport in Physically and Geochemically Heterogeneous Porous Media
AU: * Bekhit, H B
EM: hbekhit@dri.edu
AF: Desert Research Institute, 755 E Flamingo Rd, Las Vegas, Nv 89119 United States
AU: * Bekhit, H B
EM: hbekhit@dri.edu
AF: Irrigation and Hydraulics Department, Cairo University, Orman, Gamaa Street, Giza, 12613 Egypt
AU: Hassan, A E
EM: hassan@dri.edu
AF: Desert Research Institute, 755 E Flamingo Rd, Las Vegas, Nv 89119 United States
AU: Hassan, A E
EM: hassan@dri.edu
AF: Irrigation and Hydraulics Department, Cairo University, Orman, Gamaa Street, Giza, 12613 Egypt
AB: A two-dimensional model of contaminant transport in the presence of colloids is developed for heterogeneous porous media. The numerical solution of contaminant and colloids concentrations is obtained by using finite differences with a third-order total variance-diminishing (TVD) scheme for the advection terms. The model accounts for both spatially varying conductivity (physical heterogeneity), and spatially varying distribution coefficients (geochemical heterogeneity). Geochemical heterogeneity is considered for the contaminant sorption coefficient, colloids sorption (attachment) coefficient, or both. The analysis is performed within a stochastic framework using a Mont Carlo simulation technique. The model is used to investigate the impact of both physical and geochemically heterogeneity on the uncertainty associated with the contaminant movement. The effect of correlation between physical and geochemical variability is also investigated. Spatial moment and concentration variance are presented for the colloids
DE: 1829 Groundwater hydrology
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
DE: 3210 Modeling
DE: 4255 Numerical modeling
SC: Hydrology [H]
MN: 2003 Fall Meeting